Common Hoya Wax Flower (hoya species): Yours is a Hoya species, commonly called Wax Flower. There are over 200 species originating in tropical Asia and Australasia. Hoya australis is found in rainforest margins from Northern NSW to Northern Queensland and NT. It is popular for its fragrant flowers, but others have no fragrance. Most Hoyas are prized for their thick foliage and waxy-rosettes of star-shaped flowers.
Lily Of The Nile (agapanthus): The large clusters of blue, purple, lavender, or white trumpet-shaped flowers on tall stems are from the lily of the Nile plant. It is a common but beautiful landscape plant where conditions are naturally dry, and does well as long as the site is sunny and the soil well-drained. Plants prefer full sun to part shade, regular water and are pretty resilient to many growing conditions. Fertilize annually with a formula made for flowering perennial plants.